/*
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If
 * not, see <http://www.gnu.org/licenses/>.
 */
package silentium.commons.utils;

import javolution.text.TextBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.UnknownHostException;

public class Util {
	private static final Logger _log = LoggerFactory.getLogger(Util.class.getName());

	public static boolean isInternalIP(final String ipAddress) {
		java.net.InetAddress addr = null;
		try {
			addr = java.net.InetAddress.getByName(ipAddress);
			return addr.isSiteLocalAddress() || addr.isLoopbackAddress();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		}
		return false;
	}

	public static String printData(final byte[] data, final int len) {
		final TextBuilder result = new TextBuilder();

		int counter = 0;

		for (int i = 0; i < len; i++) {
			if (counter % 16 == 0)
				result.append(fillHex(i, 4)).append(": ");

			result.append(fillHex(data[i] & 0xff, 2)).append(' ');
			counter++;
			if (counter == 16) {
				result.append("   ");

				int charpoint = i - 15;
				for (int a = 0; a < 16; a++) {
					final int t1 = data[charpoint++];

					if (t1 > 0x1f && t1 < 0x80)
						result.append((char) t1);
					else
						result.append('.');
				}

				result.append("\n");
				counter = 0;
			}
		}

		final int rest = data.length % 16;
		if (rest > 0) {
			for (int i = 0; i < 17 - rest; i++)
				result.append("   ");

			int charpoint = data.length - rest;
			for (int a = 0; a < rest; a++) {
				final int t1 = data[charpoint++];

				if (t1 > 0x1f && t1 < 0x80)
					result.append((char) t1);
				else
					result.append('.');
			}

			result.append("\n");
		}
		return result.toString();
	}

	public static String fillHex(final int data, final int digits) {
		String number = Integer.toHexString(data);

		for (int i = number.length(); i < digits; i++) {
			number = '0' + number;
		}

		return number;
	}

	public static String printData(final byte... raw) {
		return printData(raw, raw.length);
	}

	public static String getStackTrace(final Throwable t) {
		final StringWriter sw = new StringWriter();
		t.printStackTrace(new PrintWriter(sw));
		return sw.toString();
	}

	public static void printSection(String s) {
		s = "=[ " + s + " ]";
		while (s.length() < 78)
			s = '-' + s;
		_log.info(s);
	}
}